B58 Catless Downpipe 4.5" For Gen 1/2 B58

Maximize performance and turbo response with our 4.5” Catless Downpipe, designed for BMW B58 engines and Toyota Supra applications. By removing the restrictive factory catalytic converter, this downpipe dramatically improves exhaust flow for faster spool, increased horsepower, and a more aggressive exhaust note.

Constructed from premium 304 stainless steel, this downpipe offers excellent durability, corrosion resistance, and heat tolerance for both street and track environments. The oversized 4.5” mandrel-bent design reduces backpressure, making it ideal for tuned vehicles, E-blends, and high-boost setups.

Features:

• 4.5” high-flow catless design

• Made from high-quality 304 stainless steel

• Increased horsepower and torque

• Faster turbo spool and improved throttle response

• Mandrel-bent for smooth, unrestricted airflow

• Direct bolt-on fit

Fitment:

• BMW B58-equipped models

• Toyota GR Supra (B58)

Important Notice:
For off-road or track use only. Tuning is recommended to avoid check engine lights.